Firing pin lock assembly



Aug. 26, 1958 E. c. LEE

FIRING PIN LOCK ASSEMBLY Filed April 16. 1954 3 Sheets-Sheet 1 ATTORNEYS Aug. 26, 1958 E. c. LEE

FIRING PIN Loox ASSEMBLY Filed April 16. 1954 3 Sheets-Sheet 2 MGM( alla.;

A TTOR/vEyS I INVENToR. I EDWARD C. LEE

Aug- 26, 1958 E. c. LEE 2,848,832

FIRING PIN LOCK ASSEMBLY Filed April 16. 1954 s sheets-sheet s rlTHIN' f gva INVENTOR. EDWARD C LEF.

M www A Trae/V578 2,843,832 Patented Aug. 26, 1958 Fui BRING PIN LocK ASSEMBLY Edward C. lLee, Detroit, Mich., assignor to Ithaca Gun Company, Incorporated, Ithaca, N. Y.

apprises@ Apre is, 1954, serial No. 423,757

1 Claim. (ci. 42-70) This invention relates to a firing pin lock assembly and, more particularly, to a breech block or bolt 1n a gun of the-automatic and semi-automatic type, which breech block contains safety features to prevent premature ring breech block in its forward movement towards the barrel of the gun, for the tiring pin in the breech block to surge forward when the forward movement of the breech block has been suddenly arrested by contact with the barrel extension and to thereby prematurely strike the primer of the lshell in the firing chamber of the barrel. Such lack of control of the firing of the shell during loading has been known to cause a considerable number of accidents because of the premature tiring of the shell during loading of the gun.

With the above and other disadvantages in View, it is an object of my invention to provide a firing pin lock assembly to prevent contact of the tiring pin with a shell being loaded into the tiring chamber.

One other object of the invention is to provide a ring pin lock assembly wherein the ring pin is locked out of contact with the shell when the inertia of the bolt is carried forward with the tiring pin during loading of the gun.

Still another object of my invention is to provide a ring pin lock of relatively simple construction which, at the same time, is free of the tendency of premature tiring.

A specic object of my invention is to provide a gun having a breech `block or bolt assembly wherein premature action of the tiring pin is prevented by means of a novel lock assembly adapted to co-act with the hammer and bolt assembly of the gun.

Other objects and features of my invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

Fig. l shows a fragmental sectional View of a shot gun of the automatic or semi-automatic type, such as disclosed by Browning U. S. patents, incorporating a preferred embodiment of my invention therein;

Fig. 2 is a top plan view of a detail showing a breech block;

Fig. 3 is an enlarged, detailed view of a section taken on line 3 3 of Fig. 2;

Fig. 4 is an enlarged, detailed fragmental View taken on line 4 4 of Fig. 3;

Fig. 5 is an enlarged, detailed sectional view taken on line 5 5 of Fig. 3;

Fig. 6 is a side elevation of Fig. 2; and

Fig. 7 is a detailed, fragmental sectional view of a modification of the embodiment shown in Fig. 4.

Referring now particularly to the drawings in which like reference characters denote like parts throughout, it will be noted that there is provided the usual type of gun 1i), such as is shown and described in the Browning U. S. Patent 689,283 issued December 17, 1901. It will be noted that said gun 10 comprises a stock 11, a receiver 12, and a gun barrel and magazine 13. In the receiver 12, it will be noted that there are provided the conventional trigger 14 and hammer 36 mechanism and a sliding breech block assembly 15, as shown. In said breech block 15, I provide a locking block 16 which is pivotally or freely mounted in the upper portion of the breech block assembly fand isadapted to move in the middle of said breech by split operating link 17 operated by a spring action assembly 18, as shown, in the stock 11 of said gun. Inside said breech block 15 there is provided a slidable tiring pin 19 wherein the forward portion is adapted, under proper conditions, to strike the primer 25 in a shell 21 when in the tiring chamber 22 of said barrel. It will be noted that said tiring pin 19, at its .rear portion, has a recess 23 to accommodate a cross pin 124 extending through block 15 so that it inhibits the forward or rearward motion of Isaid firing pin in the block 15. in addition, said breech block 15 is provided, at its rear end, with a tiring pin lock 25 which is pivotally mounted at one end to the breech by means of a pin 26 and is pivoted to said breech laterally so as to move horizontally, inwardly and outwardly of said recess 48, in said firing pin 19.

it will be noted that said ring pin lock 25, as shown, has an opening 27 at one end to accommodate said pin 1&6 in the breech block. Furthermore, the middle portion of said lock has a recess 28 and forms a terminal outwardly projecting inclined cam contacting portion 29 whereby the recess 28 is adapted to accommodate and engage the outwardly extending terminal portion 30 of said tiring pin.

It will be noted, as shown in Fig. 4 of the drawings, that the ring pin lock is held in locked position with pin 19 by means of a lock spring 31, the `shorter end 32 of which is inserted into the side opening 33 of the firing pin lock 25. Said lock spring, as noted from the drawing, extends angularly from the tiring pin lock and contacts the inner side wall 34 of the breech at 35 for normally keeping the firing pin lock in engaged position with the firing pin.

As seen from this described construction, if the breech block is forced forwardly by action spring 18, a great amount of inertia develops in the breech block assembly. Such inertia on movement of breech block 15 is prevented from actuating the tiring pin 19 since such firing pin is in engagement with or held yby said tiring pin lock 25. It is only when the hammer 36 of the trigger mechanism assembly moves forwardly in its path 37 to strike the tiring pin that the firing pin lock 25 is forced laterally, releasing its engagement with the firing pin and thus permitting impact of the hammer on the ring pin which, in turn, strikes the primer of the shell. After the tiring of said shell, the breech block moves rearwardly in the receiver and the hammer reverts to its former position preparatory to another strike. As the rearmost movement of the breech block is arrested and the forward motion is started, the locking block is rotated downward bringing the firing pin back to its rearmost position, and the tiring pin lock, due to the tension of said spring 31, engages the iiring pin again. In addition to the locking 'block retracting the firing pin, I may provide the usual spring around the firing pin to normally force the pin rearwardly in the breech block. This action is continued after each loading or ring of the shell.

In the modification shown in Fig. 7, I provide a breech biock 4i) containing a rear side opening 41 for accommodating therein a spring 42 and a plug 43 operable by said f3 spring 42. In addition, a ring pin lock 44 is pivoted to the inside of the breech block 40 by means of a pin 4S. Said pin lock 44 has an outwardly protruding part 46 and tiring pin contacting portion 47. Spring 42 normally forces plug 43 outwardly against part 46 to eiect locking of pin 19 by said contacting portion 47. Said modied form of locking means, as shown and described, can be readily used in lieu of the embodiment shown in Fig. 4

of the drawings.

From the foregoing description, taken in conjunction with the accompanying drawings, it will be noted that my invention is applicable to an automatic or other type 4of gun. I provide in the breech block a ring pin lock assembly so as to prevent premature ring when the gun is closed, without which the4 inertia of the ring pin may cause a premature explosion when there is automatic loading of the ring chamber. Furthermore, my invention is applicable to any type of rearm which has a iring pin carried lby the breech closing or sliding mechamsm.

While a preferred embodiment of my invention has been described and shown, it is to be understood that various modifications as to arrangement of parts, their use and composition, may be made Without departing from the spirit and scope of the invention as claimed herein.

I claim:

In a firearm of the type having a receiver, a breech block slidable in the receiver, a ring pin movable in the 4 breech block, the combination wherein said pin has a recess in the rear portion thereof, a ring pin lock pivotally mounted in the breech block and movable therewith, said lock having a recess positioned to selectively engage with the recess portion of said firing pin, a projection extending rearwardly beyond said pin and breech block, the end of said rearward projection extending laterally of said pin partially across the end thereof when in locking position, said rearward projection having an inclined cam surface, a second lateral projection extending in a direction away from said tiring pin, an opening formed in said breech block, a coil spring located in said opening, a plug in said opening outward of said spring, said plug being positioned to engage said second lateral projection to thereby urge the ring pin lock in pin locking position, and hammer means for making sliding contact with the cam surface to release the lock and strike the ring pin.

References Cited in the Elle of this patent UNITED STATES PATENTS 911,362 Aubrey Feb. 2, 1909 2,539,644 Turner Jan. 30, 1951 FOREIGN PATENTS 304,280 Germany Mar. 3, 1920 319,321 Germany Mar. 9, 1920 578,765 Germany June 16, 1933 660,046 Great Britain Oct. 31, 1951 

